171972946 has 8 divisors (see below), whose sum is σ = 258066684. Its totient is φ = 85950720.

The previous prime is 171972937. The next prime is 171972959. The reversal of 171972946 is 649279171.

It can be written as a sum of positive squares in 2 ways, for example, as 153388225 + 18584721 = 12385^2 + 4311^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 171972896 and 171972905.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11395 + ... + 21766.

Almost surely, 2^171972946 is an apocalyptic number.

171972946 is a deficient number, since it is larger than the sum of its proper divisors (86093738).

171972946 is a wasteful number, since it uses less digits than its factorization.

171972946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35756.

The product of its digits is 190512, while the sum is 46.

The square root of 171972946 is about 13113.8455839620. The cubic root of 171972946 is about 556.1006171097.

The spelling of 171972946 in words is "one hundred seventy-one million, nine hundred seventy-two thousand, nine hundred forty-six".